| /* |
| * linux/fs/nfsd/nfs3acl.c |
| * |
| * Process version 3 NFSACL requests. |
| * |
| * Copyright (C) 2002-2003 Andreas Gruenbacher <agruen@suse.de> |
| */ |
| |
| #include "nfsd.h" |
| /* FIXME: nfsacl.h is a broken header */ |
| #include <linux/nfsacl.h> |
| #include "cache.h" |
| #include "xdr3.h" |
| #include "vfs.h" |
| |
| #define RETURN_STATUS(st) { resp->status = (st); return (st); } |
| |
| /* |
| * NULL call. |
| */ |
| static __be32 |
| nfsd3_proc_null(struct svc_rqst *rqstp, void *argp, void *resp) |
| { |
| return nfs_ok; |
| } |
| |
| /* |
| * Get the Access and/or Default ACL of a file. |
| */ |
| static __be32 nfsd3_proc_getacl(struct svc_rqst * rqstp, |
| struct nfsd3_getaclargs *argp, struct nfsd3_getaclres *resp) |
| { |
| svc_fh *fh; |
| struct posix_acl *acl; |
| __be32 nfserr = 0; |
| |
| fh = fh_copy(&resp->fh, &argp->fh); |
| nfserr = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_NOP); |
| if (nfserr) |
| RETURN_STATUS(nfserr); |
| |
| if (argp->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT)) |
| RETURN_STATUS(nfserr_inval); |
| resp->mask = argp->mask; |
| |
| if (resp->mask & (NFS_ACL|NFS_ACLCNT)) { |
| acl = nfsd_get_posix_acl(fh, ACL_TYPE_ACCESS); |
| if (IS_ERR(acl)) { |
| int err = PTR_ERR(acl); |
| |
| if (err == -ENODATA || err == -EOPNOTSUPP) |
| acl = NULL; |
| else { |
| nfserr = nfserrno(err); |
| goto fail; |
| } |
| } |
| if (acl == NULL) { |
| /* Solaris returns the inode's minimum ACL. */ |
| |
| struct inode *inode = fh->fh_dentry->d_inode; |
| acl = posix_acl_from_mode(inode->i_mode, GFP_KERNEL); |
| } |
| resp->acl_access = acl; |
| } |
| if (resp->mask & (NFS_DFACL|NFS_DFACLCNT)) { |
| /* Check how Solaris handles requests for the Default ACL |
| of a non-directory! */ |
| |
| acl = nfsd_get_posix_acl(fh, ACL_TYPE_DEFAULT); |
| if (IS_ERR(acl)) { |
| int err = PTR_ERR(acl); |
| |
| if (err == -ENODATA || err == -EOPNOTSUPP) |
| acl = NULL; |
| else { |
| nfserr = nfserrno(err); |
| goto fail; |
| } |
| } |
| resp->acl_default = acl; |
| } |
| |
| /* resp->acl_{access,default} are released in nfs3svc_release_getacl. */ |
| RETURN_STATUS(0); |
| |
| fail: |
| posix_acl_release(resp->acl_access); |
| posix_acl_release(resp->acl_default); |
| RETURN_STATUS(nfserr); |
| } |
| |
| /* |
| * Set the Access and/or Default ACL of a file. |
| */ |
| static __be32 nfsd3_proc_setacl(struct svc_rqst * rqstp, |
| struct nfsd3_setaclargs *argp, |
| struct nfsd3_attrstat *resp) |
| { |
| svc_fh *fh; |
| __be32 nfserr = 0; |
| |
| fh = fh_copy(&resp->fh, &argp->fh); |
| nfserr = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_SATTR); |
| |
| if (!nfserr) { |
| nfserr = nfserrno( nfsd_set_posix_acl( |
| fh, ACL_TYPE_ACCESS, argp->acl_access) ); |
| } |
| if (!nfserr) { |
| nfserr = nfserrno( nfsd_set_posix_acl( |
| fh, ACL_TYPE_DEFAULT, argp->acl_default) ); |
| } |
| |
| /* argp->acl_{access,default} may have been allocated in |
| nfs3svc_decode_setaclargs. */ |
| posix_acl_release(argp->acl_access); |
| posix_acl_release(argp->acl_default); |
| RETURN_STATUS(nfserr); |
| } |
| |
| /* |
| * XDR decode functions |
| */ |
| static int nfs3svc_decode_getaclargs(struct svc_rqst *rqstp, __be32 *p, |
| struct nfsd3_getaclargs *args) |
| { |
| if (!(p = nfs3svc_decode_fh(p, &args->fh))) |
| return 0; |
| args->mask = ntohl(*p); p++; |
| |
| return xdr_argsize_check(rqstp, p); |
| } |
| |
| |
| static int nfs3svc_decode_setaclargs(struct svc_rqst *rqstp, __be32 *p, |
| struct nfsd3_setaclargs *args) |
| { |
| struct kvec *head = rqstp->rq_arg.head; |
| unsigned int base; |
| int n; |
| |
| if (!(p = nfs3svc_decode_fh(p, &args->fh))) |
| return 0; |
| args->mask = ntohl(*p++); |
| if (args->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT) || |
| !xdr_argsize_check(rqstp, p)) |
| return 0; |
| |
| base = (char *)p - (char *)head->iov_base; |
| n = nfsacl_decode(&rqstp->rq_arg, base, NULL, |
| (args->mask & NFS_ACL) ? |
| &args->acl_access : NULL); |
| if (n > 0) |
| n = nfsacl_decode(&rqstp->rq_arg, base + n, NULL, |
| (args->mask & NFS_DFACL) ? |
| &args->acl_default : NULL); |
| return (n > 0); |
| } |
| |
| /* |
| * XDR encode functions |
| */ |
| |
| /* GETACL */ |
| static int nfs3svc_encode_getaclres(struct svc_rqst *rqstp, __be32 *p, |
| struct nfsd3_getaclres *resp) |
| { |
| struct dentry *dentry = resp->fh.fh_dentry; |
| |
| p = nfs3svc_encode_post_op_attr(rqstp, p, &resp->fh); |
| if (resp->status == 0 && dentry && dentry->d_inode) { |
| struct inode *inode = dentry->d_inode; |
| struct kvec *head = rqstp->rq_res.head; |
| unsigned int base; |
| int n; |
| int w; |
| |
| *p++ = htonl(resp->mask); |
| if (!xdr_ressize_check(rqstp, p)) |
| return 0; |
| base = (char *)p - (char *)head->iov_base; |
| |
| rqstp->rq_res.page_len = w = nfsacl_size( |
| (resp->mask & NFS_ACL) ? resp->acl_access : NULL, |
| (resp->mask & NFS_DFACL) ? resp->acl_default : NULL); |
| while (w > 0) { |
| if (!rqstp->rq_respages[rqstp->rq_resused++]) |
| return 0; |
| w -= PAGE_SIZE; |
| } |
| |
| n = nfsacl_encode(&rqstp->rq_res, base, inode, |
| resp->acl_access, |
| resp->mask & NFS_ACL, 0); |
| if (n > 0) |
| n = nfsacl_encode(&rqstp->rq_res, base + n, inode, |
| resp->acl_default, |
| resp->mask & NFS_DFACL, |
| NFS_ACL_DEFAULT); |
| if (n <= 0) |
| return 0; |
| } else |
| if (!xdr_ressize_check(rqstp, p)) |
| return 0; |
| |
| return 1; |
| } |
| |
| /* SETACL */ |
| static int nfs3svc_encode_setaclres(struct svc_rqst *rqstp, __be32 *p, |
| struct nfsd3_attrstat *resp) |
| { |
| p = nfs3svc_encode_post_op_attr(rqstp, p, &resp->fh); |
| |
| return xdr_ressize_check(rqstp, p); |
| } |
| |
| /* |
| * XDR release functions |
| */ |
| static int nfs3svc_release_getacl(struct svc_rqst *rqstp, __be32 *p, |
| struct nfsd3_getaclres *resp) |
| { |
| fh_put(&resp->fh); |
| posix_acl_release(resp->acl_access); |
| posix_acl_release(resp->acl_default); |
| return 1; |
| } |
| |
| #define nfs3svc_decode_voidargs NULL |
| #define nfs3svc_release_void NULL |
| #define nfsd3_setaclres nfsd3_attrstat |
| #define nfsd3_voidres nfsd3_voidargs |
| struct nfsd3_voidargs { int dummy; }; |
| |
| #define PROC(name, argt, rest, relt, cache, respsize) \ |
| { (svc_procfunc) nfsd3_proc_##name, \ |
| (kxdrproc_t) nfs3svc_decode_##argt##args, \ |
| (kxdrproc_t) nfs3svc_encode_##rest##res, \ |
| (kxdrproc_t) nfs3svc_release_##relt, \ |
| sizeof(struct nfsd3_##argt##args), \ |
| sizeof(struct nfsd3_##rest##res), \ |
| 0, \ |
| cache, \ |
| respsize, \ |
| } |
| |
| #define ST 1 /* status*/ |
| #define AT 21 /* attributes */ |
| #define pAT (1+AT) /* post attributes - conditional */ |
| #define ACL (1+NFS_ACL_MAX_ENTRIES*3) /* Access Control List */ |
| |
| static struct svc_procedure nfsd_acl_procedures3[] = { |
| PROC(null, void, void, void, RC_NOCACHE, ST), |
| PROC(getacl, getacl, getacl, getacl, RC_NOCACHE, ST+1+2*(1+ACL)), |
| PROC(setacl, setacl, setacl, fhandle, RC_NOCACHE, ST+pAT), |
| }; |
| |
| struct svc_version nfsd_acl_version3 = { |
| .vs_vers = 3, |
| .vs_nproc = 3, |
| .vs_proc = nfsd_acl_procedures3, |
| .vs_dispatch = nfsd_dispatch, |
| .vs_xdrsize = NFS3_SVC_XDRSIZE, |
| .vs_hidden = 0, |
| }; |
| |